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$269+ Cheap flights from Fremont, CA to Sofia (SOF)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/28. Fares are subject to change and may not be available on all flights or dates of travel.
SFO — SOF
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
1 adult, Economy
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Cheapflights Tip: The best prices from Fremont to Sofia are usually found in January or October, booked 86 days in advance, depart on a Thursday or Sunday and return on a Saturday

Cheap flight deals from Fremont to Sofia

Keep the following information in mind while searching for Fremont to Sofia flight deals. Data was last updated September 16, 2025.

Round-trip from

$514
(Kiwi.com)

One-way from

$269
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$689
From Fremont to Sofia
Search Deals
One-way flight from Fremont to Sofia
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Highest demand for flights based on searches. 29% potential increase in price ($356 potential increase over avg. RT price).
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Cheapest flight prices on average. 8% potential price decrease ($64 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Fremont to Sofia

Cheapest flights from Fremont to Sofia
Explore the most affordable flight options available from Fremont to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 16, 2025.

This Kiwi.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/49:40 pmSFO - SOF
1 stop15h 05mLufthansa
Tue 11/186:00 amSOF - SFO
1 stop16h 40mLufthansa
Deal found 9/15$514
This Gotogate deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/127:30 pmSFO - SOF
1 stop31h 00mMultiple Airlines
Fri 11/146:10 amSOF - SFO
2 stops25h 12mMultiple Airlines
Deal found 9/15$526
This Cheapflightsfares deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/129:05 pmSFO - SOF
1 stop15h 55mLufthansa
Fri 11/146:10 amSOF - SFO
1 stop16h 30mLufthansa
Deal found 9/15$546
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/42:45 pmSFO - SOF
2 stops17h 35mMultiple Airlines
Tue 11/182:15 pmSOF - SFO
1 stop15h 55mMultiple Airlines
Deal found 9/15$555
This Gotogate deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/32:30 pmSFO - SOF
2 stops41h 45mMultiple Airlines
Mon 11/173:00 pmSOF - SFO
1 stop35h 30mMultiple Airlines
Deal found 9/14$559
This American Airlines deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/310:33 pmSFO - SOF
2 stops35h 37mAmerican Airlines
Mon 11/175:25 pmSOF - SFO
2 stops37h 03mAmerican Airlines
Deal found 9/14$561
This Kiwi.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/229:05 pmSFO - SOF
2 stops16h 50mMultiple Airlines
Sun 11/166:10 amSOF - SFO
1 stop16h 30mMultiple Airlines
Deal found 9/15$565
This Gotogate deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/77:25 pmSFO - SOF
1 stop28h 50mMultiple Airlines
Fri 11/216:10 amSOF - SFO
2 stops24h 24mMultiple Airlines
Deal found 9/15$570
This Kiwi.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/222:40 pmSFO - SOF
1 stop17h 10mLufthansa
Sun 11/166:10 amSOF - SFO
1 stop16h 30mLufthansa
Deal found 9/15$572
This Kiwi.com deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/69:40 pmSFO - SOF
1 stop15h 05mLufthansa
Thu 11/206:00 amSOF - SFO
1 stop16h 40mLufthansa
Deal found 9/14$573
This Mytrip deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/1511:35 amSFO - SOF
3 stops26h 00mMultiple Airlines
Wed 10/296:35 pmSOF - SFO
2 stops31h 55mMultiple Airlines
Deal found 9/14$586

Cheapflights Fare Finder

 
Customize your flight search to find flights from Fremont to Sofia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 16, 2025.
Use the filters below to find and compare flights from Fremont to Sofia that are best for you.

Fly from

Fremont

Fly to

Sofia

Route

Depart

Return

Price

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Tue 11/4

9:40 pm-10:45 pm

1 stop15h 05m

Sofia

Tue 11/18

6:00 am-12:40 pm

1 stop16h 40m

$514

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Tue 1/13

5:30 pm-8:10 pm

1 stop16h 40m

Sofia

Wed 4/15

9:30 pm-1:50 pm

1 stop26h 20m

$548

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Mon 1/12

9:40 pm-10:45 pm

1 stop15h 05m

Sofia

Fri 1/23

6:10 am-9:22 pm

2 stops25h 12m

$552

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Tue 1/13

8:31 am-6:20 pm

2 stops23h 49m

Sofia

Tue 1/27

6:00 am-9:22 pm

2 stops25h 22m

$552

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Tue 1/13

9:40 pm-10:45 pm

1 stop15h 05m

Sofia

Thu 4/16

6:15 am-4:05 pm

1 stop19h 50m

$552

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Wed 1/14

1:30 pm-10:45 pm

1 stop23h 15m

Sofia

Fri 4/17

6:15 am-4:05 pm

1 stop19h 50m

$552

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Wed 1/14

9:40 pm-10:45 pm

1 stop15h 05m

Sofia

Tue 4/14

6:15 am-12:40 pm

1 stop16h 25m

$553

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Sun 1/18

1:30 pm-6:20 pm

1 stop18h 50m

Sofia

Tue 4/14

6:15 am-12:40 pm

1 stop16h 25m

$553

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Tue 1/13

9:40 pm-10:45 pm

1 stop15h 05m

Sofia

Fri 4/17

6:15 am-12:40 pm

1 stop16h 25m

$553

San FranciscoSofia

SFO - SOF

SFOSOF

San Francisco

Mon 1/12

1:30 pm-10:45 pm

1 stop23h 15m

Sofia

Fri 4/17

6:15 am-12:40 pm

1 stop16h 25m

$553

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 17 results
1
2

Best time to book a flight from Fremont to Sofia

Have a flexible travel schedule? Discover the best time to fly to Sofia from Fremont with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Fremont to Sofia

How far ahead should I book a flight from Fremont to Sofia?

Use this chart to determine the optimal time to book a round-trip flight from Fremont to Sofia. Price data was last updated on September 12, 2025.

The price you pay for your flight from Fremont to Sofia may vary depending on when you book. For the best chance of a lower fare, look to book 86 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Fremont to Sofia?

Currently, November is the cheapest month in which you can book a flight from Fremont to Sofia (average of $632). Flying from Fremont to Sofia in June is currently the most expensive (average of $1,185). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from FR8 to SOF?

Find hourly flight availability from Fremont to Sofia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 16, 2025.

When flying from Fremont to Sofia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What is the cheapest day to fly from Fremont to Sofia?

Use this chart to determine the cheapest time to fly round-trip from Fremont to Sofia. Price data was last updated on October 13, 2024.

Travelers seeking maximum savings on their Fremont to Sofia flight should consider departing on Thursday mornings when fares are most often at their lowest. Saturday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing Sofia

Get insights into the airlines that provide service to Sofia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sofia. Reviews last updated September 16, 2025.
Get a feel of what it's like to fly with United Airlines, Turkish Airlines, and Air Canada from Fremont to Sofia by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,929 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Crew

8.1

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,929 reviews
United Airlines
7.4
Good
8,929 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Crew

8.1

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Turkish Airlines
7.3
Good
3,968 reviews
United Airlines
7.4
Good
8,929 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Crew

8.1

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Air Canada
7.1
Good
10,000 reviews
United Airlines
7.4
Good
8,929 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Crew

8.1

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Lufthansa
6.8
Okay
7,407 reviews
United Airlines
7.4
Good
8,929 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Crew

8.1

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
ITA Airways
6.7
Okay
1,036 reviews
United Airlines
7.4
Good
8,929 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Overall

7.4

Crew

8.1

Boarding

7.7

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from Fremont to Sofia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Sofia from Fremont?

    Sofia (SOF) is the airport you will fly into if you book a flight from Fremont to Sofia. You should not have trouble finding flights to Sofia from Fremont; the airport handles an average of 0 inbound flights from Fremont per day. You should also have plenty of airline options to choose from since 5 airlines have flights to the Sofia airport from Fremont. It is only a 4.2 mi journey from Sofia (SOF) to Sofia’s city center.

  • How long is the flight from Fremont to Sofia?

    Airlines like Lufthansa, British Airways, and United Airlines fly from Fremont to Sofia in about 15h 05m. The time it takes to get you to your destination can typically vary by up to 1h 35m. The distance from Fremont to Sofia is about 6481 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • Can I find deals for flights from Fremont to Sofia that include hotel bookings?

    Yes. In addition to deals on Fremont to Sofia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Fremont to Sofia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Fremont to Sofia.

  • Can I find deals for business class flights from Fremont to Sofia?

    Yes. Cheapflights offers flight deals from Fremont to Sofia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Fremont to Sofia?

    Currently, November is the cheapest month in which you can book a flight from Fremont to Sofia (average of $632). Flying from Fremont to Sofia in June is currently the most expensive (average of $1,185). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top 5 airlines flying from Fremont to Sofia

Discover the top 5 airlines that operate flights from Fremont to Sofia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
Turkish AirlinesCheapest$542Average$679FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$627Average$973FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$628Average$1,012FlexibilityNo cancel feeOn-time76%
ITA AirwaysCheapest$652Average$1,154FlexibilityNo cancel feeOn-time81%
Air CanadaCheapest$1,023Average$1,138FlexibilityNo cancel feeOn-time67%

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